Lettering scriber



W. H. SCHNEIDER Nov. 13, 1951 LETTERING SCRIBER 2 SHEETSSHEET 1 FiledMarch 5, 1949 INVENTOR. WALTER HARRY SCHNEIDER N 1951 w. H. SCHNEIDERLETTERING SCRIBER 2 Sl-lEETS-Sl-IEET 2' Filed March 5, 1949 x mmINVENTOR. WALTER HARRY SCHNEIDER Patented Nov. 13, 1951 UNITED STATESPATENT OFFICE 2,574,664 LETTERING SCRIBER Walter Harry Schneider,Ridgefi eld, N. J assignor to Keuff'el"& Esser Company, Hoboken, N. J a

corporation of New Jersey Application March 5, 1949, Serial No. 79,797

4 Claims.

This invention relates to lettering instruments. It is useful inlettering instruments of the general type shown and described in U. S.Patent 2,011,195 to Adolf W. Keuffel. This type of let- }t'eringinstruments consists of a scriber provided with a writing instrumenthaving a tracer pin and a' tail pin; and a template provided withindicia or markings which may be followed by .thetracer pin and a tailpin groove parallel to the direction of lettering for receiving the tailpin. .The term indicia as used herein is meant .to include all types ofmarkings which may be reproduced, such as letters, numb'ers,'electricalsymbols, welding symbols and the like.

It has become the practice in the manufacture of templates for this typeof lettering instrument to make templates of at least two widths. The

wider templates may be for the purpose of carwriting instrument andtracer pin.

As described in the aforementioned patent the usual template has indiciawhich are backwardly inclined by a predetermined amount so that theadjustable scriber will draw erect indicia in its closed or normalposition. If the spacing between the writing instrument and the tracingpin on the adjustable scriber is increased from the closed or normalposition, the scriber will draw forwardly slanted letters if the sametemplate is used.

If the wider form of template is provided with indicia having the samebackward slant, the adjustable scriber in open position will drawforwardly slanted letters. In order for the adjustable scriber to drawupright indicia in its open position, it was necessary to increase theback- Ward inclination of the indicia on the templates.

In using this system, it was necessary to make vide a tail pieceextension for an adjustable scriber of a lettering instrument so that itmay be-used. in the open position with a wide template 2. to draw erectindicia when the indieia on the template are inclined only the normalamount;

This and other objects of the invention and the method of theirattainment will be more fully understood from the iollowi'ng descriptiontaken inconnection with the accompanying drawing in which:

Figure I is a view in plan of the lettering iristrument shown anddescribed in Patent N6. 2,011,195 with a tail piece extension armsecured to the adjustable scriber thereof.

Figure II is a View in elevation and partly in section of the tail pieceextension arm shown in Figure I.

Figure III is a view in plan looking from the underneath side of the armas shown" in Figure I.

Figure IV is a view in plan of the lettering instrument shown anddescribed in patentapplication Serial No. 6576, filed February 6, 1948,with a tail piece extension arm securedto the adjustable scriberthereof.

Figure V is a view in elevation and partly in section of thetailpiece-extension arm shown Figure IV.

Figure VI is a view in plan of the tail piece extension arm look-ingfrom the underneath side of the arm as shown in Figure IV.

Referring to Figure I} the adjustable scriber l'lis provided with a tailpiece extension arm 50'" and is arranged for use with the-wide template16. The template I6 is provided with a tail pin groove ['8' and indiciagrooves 15. The scriber H is made up of a-bod yportion 23, a tail pinarm 2-2, awriting instrument arm 25 and an" adjustable tracer pin arm24. The tail piece 22 normally' carries a tail pin at ll but this hasb'ee'n removed to permit the extension 60 to be secured to the scriberH. The writing instrument arm 25 is provided with means for holding awriting instrument which in this case is the pen I2. The adjustabletracer pin armcarries the tracer pin [4.

The adjustable tracer pin arm pivots around the pin 62 carried withinthe body 23- of the scriber ll. An arcuate slot 68'is provided in thetracer pinarm 24* which receives the pin 69" car nee the body 23 or thescriber H. Fhe pin 69- limits the pivotal motion-of the tracer pin-arm24 and is threaded to receive the knurled n'l'it' 1 1 at its lowerextremity. knurled nut 14 serves to clamp the tracer pin arm adjustedposition. b

In Figure I the adjustable arm 2 4 is shown adjusted to a predeterminedopen position. I-tis shown in dotted lines in its normal closed position. When the adjustable scriber is assembled with the'tail pin in itsnormal pqsition' andwith the adjustable scriber in its closed or normalposit n; th w in ns umen tracer pin a tail pin form the vertices of atriangle I2, I4, II. The tail pin extension arm 60 is provided withsuchv dimensions that the tail pin I'I, writing instrument I2 and tracerpin I4 in predetermined position form the vertices of a triangle I2, I4,II. It is necessary that the triangle I2, I4, I! be substantiallygeometrically similar to the triangle I2, I4, IT, in order that the openscriber with tail pin extension will draw erect indicia I3 from theindicia I5 provided on the template I6 and having the normal backwardslant as will permit the adjustable scriber in normal position withouttail piece extension to draw erect indicia, The dimensions of the tailpiece extension :EIJ'that will accomplish this result will depend on thedimensions of the adjustable scriber including the position of the pivotpin 62 for the adjustable tracer pin arm and the desired predeterminedspacing between the writing instrument I2 and the tracer pin I4 whichwill in turn depend on the width of the template I6. These dimensionsmay be readily ascertained for any given adjustable scriber and anygiven template by a person skilled in the art.

In order that the spacing between the writing instrument I2 and thetracer pin I4 may be accurately set to the predetermined value whenusing the tail pin extension 60, a pair of marks or holes 80 and 82 areprovided on the template III The spacing may be readily set to thepredetermined value by comparison with the marks 80 and 82.

The tail piece extension arm 80 shown in Figures II and III is providedwith an opening 84 on its under side accurately made to receive the tailpin arm 22 of the scriber II. The hole 86 provided at the top of theextension arm 60 opens into the opening 84. In order to apply the tailpiece extension arm 60 to the adjustable scriber II, the tail pin mustbe removed from the tail pin arm 22. The tail pin arm is then insertedin the opening 84 of the extension arm 60 so that the hole 86 lines upwith the hole II. The tail pin extension arm may then be secured to thetail pin arm 22 by a screw 88 passing through the hole 86 and engagingthreads in the hole II which is threaded to receive either the tailpin, 1. e., the screw 35 or the screw 08.

The tail pin Il may be secured to the tail pin extension arm 60 in thesame manner as it is normally secured to the tail pin arm and as isshown and described in Patent No. 2,050,058. The pin I? is tightlyfitted in an axial hole provided in a screw 35. with a head 34 whichdetermines the spacing between the lower surface of the extension arm 60and the template I6. The screw 35 engages threads in the hole 38provided in the extension arm 60 thereby securing the tail pin I! to theextension arm 50. A weight 38 may be provided which has a threaded holeto engage the screw 35. The weight 38 is preferably of lead and helps toprevent the tail pin from coming out of the tail pin groove I8.

Referring to Figure IV, the adjustable scriber I38 is provided with atail pin arm I42, a tracer pin arm Hi8, an adjustable writing instrumentarm I50 and a body portion I40. The tail pin arm normally carries a tailpin at I52, but in Fig. IV the tail pin extension arm 260 is securedthereto. The tracer pin arm I48 carries the tracer pin I54. The writinginstrument arm is provided with means for carrying a writing instrumentwhich in this embodiment is the pen I56. The writing instrument arm I50pivots about 4 the pin I45 and is provided with an arcuate slot I12. Thefixed pin I10 passes through the armate slot I12 and limits the motionof the writing instrument arm I50. The lever I80 engages threads on thepin I10 and clamps the adjust- V able writing instrument arm I50 inadjusted The screw 35 is provided position.

The adjustable writing instrument arm I50 is shown in an adjusted openposition with the writing instrument I56 spaced at a predetermineddistance from the tracer pin I54. The writing instrument arm I50 is alsoshown in dotted lines in its normal position. When the writinginstrument arm I50 is in its nomral position, the writing instrumentI56, the tracer pin I54 and the normal position for the tail pin I52form a right triangle I52, I54, I56.

When the writing instrument arm I50 is adjusted to its predeterminedopen position and the tail pin extension arm 260 is secured to the tailpin arm I42, the writing instrument I56, the tracer pin I54 and the tailpin 2II form the vertices of a triangle 2II, I54, I56. The triangle 2I1, I54, I56 should be substantially geometrically similar to thetriangle I52, I54, I56 in order that the scriber in predeterminedadjusted position with the tail pin extension arm attached will produceerect indicia from a template provided with indicia slanted backward inthe normal manner.

In the embodiment of Figure IV the triangles I52, I54, I56 and 2H, I54,I56 will be right triangles for the reasons described in patentapplication Serial No. 6,576 already referred to.

The template I02 may also be provided with two spaced marks or holes 280and 282 for setting the spacing between the tracer pin I54 and thewriting instrument I56 to the predetermined amount. This is thepreferred method but this setting may also be accomplished by referenceto an ordinary scale graduated in inches or any other convenient unit.The setting may also be made by means of the index mark I84 and thescale I82.

The construction of the tail piece extension arm 260 as shown in FiguresV and VI is equivalent to the construction of the extension arm 60 inFigure I except that the dimensions are chosen to correspond to theadjustable scriber I38 instead of the adjustable scriber I I.

By adhering to the principle of similar triangles herein taught theinvention can be readily applied to a wide variety of designs foradjustable scribers. Equivalent means for securing the extension arm tothe tail pin arm may also be used within the spirit and scope of theinven tion.

Having thus described the invention, what is claimed is:

1. An extension for the tail piece of an adjustable scriber having awriting instrument, a tracer pin and a tail pin formingthe vertices of atriangle, the spacing between the tracer pin and the writin instrumentbeing adjustable to spacings greater than the normal spacing at whichthe scriber draws erect indicia with the tail pin in its normal positionon the scriber from a template having characters inclined at apredetermined angle, said extension comprising an arm having means forcarrying a tail pin and means for securing said arm to the scriber, sothat when said arm is secured to the scriber and the scriber is adjustedto make the spacing between the writing instrument and the tracer pinequal to a predetermined increased spacing, said means for carrying thetail pin is in such a position that a tail pin carried thereby togetherwith the writing instrument and tracer pin in their adjusted positionsform the vertices of a triangle which is substantially geometricallysimilar to the triangle formed by the writing instrument, tracer pin andtail pin when the tracer pin and writing instrument are adjusted totheir normal spacing and the tail pin is in its normal position on thescriber.

2. A lettering instrument of the type described comprising an adjustablescriber having a writing instrument, a tracer pin and a tail pin formingthe vertices of a triangle and which may be used with a normal widthtemplate having a tail pin groove and indicia grooves inclined at apredetermined angle, the spacing between the tracer pin and the writinginstrument being adjustable to spacings greater than the normal spacingat which the scriber draws erect indicia with the tail pin in its normalposition on the scriber from the normal width template; an ex tensionarm for said scriber having means for carrying a tail pin; means forsecuring the extension arm to the scriber; a template wider than thenormal width template having a tail pin groove and indicia groovesinclined to the same predetermined angle as in the normal widthtemplate, the width of said template bein greater than the maximum widthwhich would permit complete indicia to be drawn therefrom with thenormal spacing between the tracer pin and writing instrument and a pairof spaced marks on said wider template for setting the spacing betweenthe tracer pin and writing instrument to a predetermined adjustedposition, so that when said arm is secured to the scriber and thescriber is adjusted to make the spacing between the writing instrumentand the pin equal to the predetermined amount, said means for carryingthe tail pin is in such a position that a tail pin carried therebytogether with the writing instrument and tracer pin in adjusted positionform the vertices of a triangle which is substantially geometricallysimilar to the triangle formed by the writing instrument, tracer pin andtail pin when the tracer pin and writing instrument are adjusted totheir normal spacing and the tail pin is in its normal position on thescriber.

3. An extension for a scriber having a writing instrument arm, anadjustable tracer pin arm and a tail pin arm, which arms carry a writinginstrument, a tracer pin and a tail pin forming the vertices of atriangle, the adjustment of the tracer pin arm being capable ofincreasing the spacing between the tracer pin and the writing instrumentto spacings greater than the normal spacing at which the scriber drawserect indicia with the tail pin in its normal position on the inginstrument and tracer pin in adjust-ed position form the vertices of atriangle which is substantially geometrically similar to the triangleformed by the writing instrument, tracer pin and taii pin when thetracer pin arm is adjusted to give the normal spacing between the tracerpin and writing instrument and the tail pin is in its normai position onthe scriber.

An extension for a scriber having an adjustable Writing instrument arm,a tracer pin arm and a tail pin arm, which arms carry a writinginstrument, a tracer pin and a tail pin forming the vertices of atriangle, the adjustment of the tracer pin arm being capable ofincreasing the spacing between the tracer pin and the writing instrumentto spacings greater than the normal spacing at which the scriber drawserect indicia with the tail pin in its normal position on the scriberfrom a template having characters inclined at a predetermined angle,said extension comprising an arm which may be secured to the scriber forextending said tail pin arm having means for carrying a tail pin so thatwhen said arm is secured to the scriber and the scriber is adjusted tomake the spacing between the Writing instrument and the tracer pin equalto a predetermined increased spacing said m-eans for carrying the tailpin is in such a position that a tail pin carried thereby together withthe tracer pin and writing instrument in adjusted position form thevertices of a triangle which is substantially geometrically similar tothe triangle formed by the writing instrument, tracer pin and tail pinwhen the writing instrument arm is adjusted to give the normal spacingbetween the tracer pin and writing instrument and the tail pin is in itsnormal position on the scriber.

WALTER HARRY SCHNEIDER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,011,195 Keufrel Aug. 13, 19352,088,063 Kassebaum July 27, 1937

